CPV code 44520000 designates Locks, keys and hinges in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
44520000 sits under 44500000 (Tools, locks, keys, hinges, fasteners, chain and springs) and groups 3 more specific sub-codes. When classifying a tender, choose the narrowest code that still covers the full subject of the contract.